Dear Mamadouba,
Many thanks for your useful feeedback. Like I said earlier , I am cutting my teeth in Remote sensing and image processing.
So when you say the following products contains surface reflectance, i am a bit confused her e.
I am working with these products and thought that the bands pixels are submitted with DN values which I now need to convert to TOA reflectance.
And someone some where has already provided clues to the algorithm that can be used to convert DNs to TOA.
Please could you clarify exactly what you mean?
Again with the gap filling, I used the steps outlined by usgs on Landsat page
see link: https://landsat.usgs.gov/gap-filling-landsat-7-slc-single-scenes-using-erdas-imagine-TM
which has also been confirmed by this video link:
Are these methods significantly different from the one you are referring to ? that is usung the gap mask files
With kind regards